古代欧洲文化中数字采用二十进制,法语保留了这个传统,而其他语言改为十进制。在法语中数字90 表示为 "quatre-vingt-dix", 字面意思是 “4个二十和1个十”。The vigesimal(base-20) numbering system used by ancient European cultures influenced the development of numerals. French retains this older numbering structure form while most languages have shifted to base-10.(decimal).